In article ,
PJO wrote:
Also consider that burglars do what they do for a living and tend to be
anything but stupid. A quick look through your window will reveal the
fact that your PIR is half way down you wall and is therefore pet proof.
The thief then simply enters the room and stays low.

The ones I've got had a choice of lenses and also allowed some adjustment
in the horizontal plane. So they're mounted in the 'conventional' place.
They seemed to cope ok with a cat when I last had one, but she was fairly
old and didn't jump that high. ;-)

--
*Shin: a device for finding furniture in the dark *

Dave Plowman London SW 12
RIP Acorn